Why was the United States involved in Patrice Lumumba's assassination?

Question

It hasn't been proven that the United States was involved with Lumumba's assassination. The U.S. didn't like him, though, because he was leading the Congo toward the Soviet Union.

Check these sites for information about his assassination.

http://en.wikipedia.org/wiki/Patrice_Lumumba#Death_of_Lumumba

http://encarta.msn.com/encyclopedia_761559104/Lumumba_Patrice.html

http://www.africawithin.com/lumumba/who_killed_lumumba.htm

http://www.africawithin.com/lumumba/murder_of_lumumba.htm